"To keep your treasures safe and sound, Smart Lockers are supplied.
Gringotts-made and wizard-proofed, for all you need to hide.

A Smart Locker is a type of locker used for storing valuable or bulky possessions. Smart Lockers are produced by the goblins of Gringotts Wizarding Bank and have been wizard-proofed.

Hogwarts School of Witchcraft and Wizardry houses a quantity of Smart Lockers in its dungeons. They are used for storing possessions that riders of the school's enchanted benches do not wish to carry with them on the ride.